Ancient Mars may have had an environment capable of harboring an underground world teeming with microscopic organisms

This year’s Nobel Prize in physiology or medicine has been awarded to Swedish scientist Svante Paabo for his discoveries on human evolution

This year’s Nobel Prize season approaches as Russia’s invasion of Ukraine has shattered decades of almost uninterrupted peace in Europe and raised the risks of a nuclear disaster

The mounds of smelly sargassum seaweed piling up off Mexico’s Caribbean coast may have had only a localized impact on tourism, but for the people who have to scrape it off beaches with pitchforks, it has become a nightmare, and possibly a health threat

It's an increasingly familiar sight in U.S. cities and suburbs: workers in gloves and masks, spraying yards for mosquitoes

The White House says President Joe Biden tested positive for COVID-19 again Saturday, slightly more than three days after he was cleared to exit coronavirus isolation

China has added a laboratory to its permanent orbiting space station as it moves toward completing the structure in coming months

China has launched one of two laboratory modules to complete its permanent orbiting space station

Monarch butterflies are now listed as endangered because of fast dwindling populations in North America